单项选择题

It is no easy job to be a teacher. One has to be extremely patient () the students.

A. at
B. about
C. on
D. with

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单项选择题
--Where is the man you talked about yesterday --Look!()

A. Here he comes
B. Here comes he
C. Here does he come
D. Here is he coming
单项选择题
(), he knew a lot.

A. As he was young
B. Young as he was
C. Young was he
D. He was young
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